US2024266894A1PendingUtilityA1
Flux concentrate type motor
Est. expiryFeb 6, 2043(~16.5 yrs left)· nominal 20-yr term from priority
H02K 2201/06H02K 2213/03H02K 21/14H02K 1/16H02K 1/276H02K 1/2773
50
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
A flux concentrate type motor includes a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core; and a plurality of arc type permanent magnets each inserted between two adjacent outer diameter portion cores. A first angle θ1 formed between a first extension line connecting a center of the arc type permanent magnet and a center of the inner diameter portion core and a second extension line connecting a center of an outer arc of the outer diameter portion core and the center of the inner diameter portion core may satisfy: θ1=k1×PA (kl is 0.16 to 0.55, and PA=360°/(2×P(a number of pole of the permanent magnet)), where the first angle θ1 may be between 4° and 10°.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A flux concentrate type motor comprising:
a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a bridge connecting the plurality of outer diameter portion cores to the inner diameter portion core; and an arc type permanent magnet inserted between two adjacent outer diameter portion cores of the plurality of outer diameter portion cores, wherein a first angle θ1 defined between a first extension line and a second extension line satisfies Equation (1):
θ1
=
k
1
×
PA
,
(
1
)
PA
=
360
°
/
(
2
×
P
)
,
where k1 is 0.16 to 0.55, and P is a number of pole of the arc type permanent magnet,
wherein the first extension line connects a center of each of the arc type permanent magnet with a center of the inner diameter portion core, and
wherein a second extension line connects a center of an outer arc of each of the plurality of outer diameter portion cores with the center of the inner diameter portion core.
2 . The flux concentrate type motor of claim 1 , wherein the first angle θ1 is between 4° and 10°.
3 . The flux concentrate type motor of claim 2 , wherein a width B of the arc type permanent magnet satisfies Equation (2):
B
=
k
2
×
B
′
(
k
2
is
0.5
to
0.75
,
and
B
′
is
a
radius
of
the
rotor
core
)
.
(
2
)
4 . The flux concentrate type motor of claim 3 , wherein the arc type permanent magnet includes:
an inner diameter portion having a first curvature; an outer diameter portion having a second curvature different from the first curvature; and a connecting portion connecting an end portion of the inner diameter portion to an end portion of the outer diameter portion, wherein a second angle θ2 defined between (i) a third extension line connecting the center of the inner diameter portion and the center of the inner diameter portion core and (ii) a fourth extension line connecting a center of the outer diameter portion and the center of the inner diameter portion core satisfies Equation (3):
θ2
=
k
3
×
PA
,
(
3
)
PA
=
360
°
/
(
2
×
P
)
,
where k3 is 0.7 to 0.9, and P is a number of pole of the arc type permanent magnet.
5 . The flux concentrate type motor of claim 4 , wherein the connecting portion includes:
a first straight portion connected to the end portion of the outer diameter portion; and a second straight portion connecting an end portion of the first straight portion with the end portion of the inner diameter portion, and wherein a third angle θ3 of 5° to 20° is maintained between (i) a fifth extension line connecting a center of the first straight portion formed at an end portion of the arc type permanent magnet from the center of the inner diameter portion core and (ii) a sixth extension line connecting the center of the first straight portion formed at an opposite end portion of the arc type permanent magnet from the center of the inner diameter portion core.
6 . The flux concentrate type motor of claim 5 , wherein the arc type permanent magnet includes a first arc type permanent magnet and a second arc type permanent magnet that are adjacent to each other,
Wherein each of the plurality of outer diameter portion cores includes:
a first side that contacts an inner diameter portion of the first arc type permanent magnet,
a second side that contacts an outer diameter portion of the second arc type permanent magnet positioned at an opposite side of the first side, and
a first incision positioned at a lower end portion, and
wherein the first incision extends from an end portion of a second side of each of the plurality of outer diameter portion cores toward the first side.
7 . The flux concentrate type motor of claim 6 , wherein the bridge includes:
a first side extending from an end portion of a first side of each of the plurality of outer diameter portion cores and connected to the inner diameter portion core; and a second side opposite to the first side of the bridge and connected to the inner diameter portion core.
8 . The flux concentrate type motor of claim 7 , wherein the second side of the bridge is spaced apart from an end portion of the outer diameter portion of the second arc type permanent magnet toward the first side of each of the plurality of outer diameter portion cores.
9 . The flux concentrate type motor of claim 8 , wherein a portion of the first side of the bridge contacts at least a portion of a connecting portion of the first arc type permanent magnet.
10 . The flux concentrate type motor of claim 9 , wherein the first incision extends toward the first side of each of the plurality of outer diameter portion cores from a portion where a first straight portion of the first arc type permanent magnet and a lower end portion of the second side of each of the plurality of outer diameter portion cores are connected.
11 . The flux concentrate type motor of claim 10 , wherein the second side of the bridge extends from an end portion of the first incision and is connected to the inner diameter portion core.
12 . The flux concentrate type motor of claim 11 , wherein a portion where the second side of the bridge and the end portion of the first incision are connected is positioned radially outward from the first straight portion of the first arc type permanent magnet.
13 . The flux concentrate type motor of claim 11 , wherein the first incision and the second side of the bridge define an acute angle.
14 . The flux concentrate type motor of claim 11 , wherein the first incision is parallel to at least a portion of the connecting portion of the first arc type permanent magnet.
15 . The flux concentrate type motor of claim 10 , wherein each of the plurality of outer diameter portion cores further includes a second incision extending radially outward from the end portion of the first incision.
16 . The flux concentrate type motor of claim 15 , wherein the second side of the bridge extends from an end portion of the second incision and is connected to the inner diameter portion core.
17 . The flux concentrate type motor of claim 16 , wherein a portion where the second side of the bridge and the end portion of the second incision are connected is positioned radially outward from the first straight portion of the first arc type permanent magnet.
18 . The flux concentrate type motor of claim 17 , wherein the second incision and the second side of the bridge define an acute angle.
19 . The flux concentrate type motor of claim 17 , wherein the first incision is parallel to at least a portion of the connecting portion of the arc type permanent magnet.
20 . The flux concentrate type motor of claim 4 , wherein the arc type permanent magnet satisfies at least one of Equations (4)-(8):
A
=
k
4
×
C
(
k
4
is
0.31
to
0.37
)
,
(
4
)
B
=
k
5
×
A
(
k
5
is
2.9
to
3.75
)
,
(
5
)
B
=
k
6
×
E
(
k
6
is
1.8
to
2.7
)
,
(
6
)
D
=
k
7
×
C
(
k
7
is
0.62
to
0.98
)
,
and
(
7
)
M
=
(
C
/
D
)
×
A
/
(
C
-
D
)
(
M
is
greater
than
or
equal
to
2.5
)
,
(
8
)
where A is a thickness of the arc type permanent magnet, B is a width of the arc type permanent magnet, C is a first curvature of the inner diameter portion, D is a second curvature of the outer diameter portion, and E is a magnetization center point gap.Join the waitlist — get patent alerts
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